Gas turbine engine efficiency can be increased by the improvements of the cooling air system. In this study, gas turbine preswirl cooling system is computationally analyzed using a validated three-dimensional quasi-steady model. In the first phase of the study, the system is analyzed with respect to different operating conditions, for understanding its behavior. In this part, the dependence of ...

This paper proposes an effective numerical methodology to analyze the mechanism of the separation of an inserted type of solid rocket booster from a supersonic air breathing engine vehicle having a conical intake. Unlike the previous computational fluid dynamic (CFD) approach, present work constructs a compacted model capable to reduce the computational time definitely. The dynamics of vehicle ...

Understanding and modelling of main annulus gas ingestion through turbine rim seals is considered and advanced in this paper. Unsteady 3-dimensional computational fluid dynamics (CFD) calculations and results from a more elementary model are presented and compared with experimental data previously published by Hills et al (1997). The most complete CFD model presented includes both stator and ro...

In the present paper, we report high-fidelity CFD simulation of plume dynamics of a pulse detonation engine (PDE) by using modern parallel computer architecture. The two-dimensional axisymmetric Euler equations for reacting flows are solved by the Space-Time CESE method. A one-step global reaction is employed to model chemical reactions of a propane/air mixture. Computational domain includes th...

Abstract The current study aims at simulating the in-cylinder combustion process in a diesel engine and investigating performance pollutant formation. simulation is performed on 3D sector employing appropriate models for various physical chemical processes contributing phenomenon. overall model includes Transition SST turbulence model, eddy dissipation chemistry interaction, Moss–Brookes soot c...

Since the introduction of mandatory energy efficiency design index (EEDI), several studies have been conducted on maneuverability waves owing to decrease in engine power. However, most used mean wave force during a single cycle evaluate and investigated turning performance. In this study, we calculated external accordance with angle incidence width wavelengths encountered by KVLCC2 (KRISO very ...

Title of Dissertation: CFD Based Unsteady Aerodynamic Modeling for Rotor Aeroelastic Analysis Jayanarayanan Sitaraman, Doctor of Philosophy, 2003 Dissertation directed by: Associate Professor James D. Baeder Department of Aerospace Engineering A Computational Fluid Dynamics (CFD) analysis is developed for 3-D rotor unsteady aerodynamic load prediction. It is then coupled to a rotor structural a...

Using computational fluid dynamics (CFD) techniques to model buoyancy-driven airflows has always proved challenging. This work investigates CFD modelling of buoyancy-driven natural ventilation flows in a single-storey space connected to an atrium. The atrium is taller than the ventilated space and when warmed by internal heat gains producing a column of warm air in the atrium and connect space ...

Abstract This work presents an experimental and numerical investigation of the laminar-turbulent transition secondary flow structures in a turbine rear structure (TRS). The study was executed at engine representative Reynolds number inlet conditions three different load cases. Experiments were performed annular rotating rig with shrouded low-pressure upstream TRS test section. results obtained ...